Refactor logging

[vidiecan]

Problem

The current logging implementation in dspace_rest_client/client.py appears to lack standardized patterns.

Proposed Solution

Refactor logging to:

Standardize logger acquisition

_logger = logging.getLogger(__name__)

and do not use basicLogging or similar, let the user of the package to deal with this.

We're prepared to submit a PR if this refactor aligns with the project's direction.

[kshepherd]

@vidiecan please feel free to open a PR improving the logger usage - I have no strong opinions and your proposal looks good to me. Thanks!